Compaq Computer Corporation Information for VU#368819

Double Free Bug in zlib Compression Library Corrupts malloc's Internal Data Structures



Vendor Statement

Hash: SHA1



SSRT0818U HP Tru64 UNIX V5.1A zlib
         Potential Security Vulnerability

NOTICE: There are no restrictions for distribution of this
       Bulletin provided that it remains complete and intact.

RELEASE DATE: October 2002


SOURCE: Compaq Computer Corporation,
       a wholly-owned subsidiary of
       Hewlett-Packard Company and
       Hewlett-Packard Company
       HP Services
       Software Security Response Team



      This bulletin will be posted to the support website within
     24 hours of release to
     Use the SEARCH IN feature box, enter SSRT0818U in the search window.

   SSRT0818U  zlib  (Severity - High)

   A potential security vulnerability has been discovered, where under
  certain circumstances, system integrity may be compromised. This may
  be in the form of improper file or privilege management. Compaq has
  corrected this potential vulnerability.


   HP Tru64 UNIX 5.1A only



   HP Tru64 UNIX V5.1, V5.0A, V4.0G, V4.0F

   HP NonStop Servers

   HP OpenVMS


   The HP Tru64 UNIX fix is available in the mainstream release
  patch kit for HP Tru64 UNIX V5.1A PK3 (BL3).

   HP Tru64 UNIX 5.1A

   Kit Name:   t64v51ab03as0003-20020827.tar

   Kit Location:

 Information on how to verify MD5 and SHA1 checksums is
available at:

 After completing the update, HP and Compaq strongly recommend that you
perform an immediate backup of  the system disk so that any subsequent
restore operations begin with updated software. Otherwise, the updated
must be re-applied after a future restore operation.  Also, if at some
future time the system is upgraded to a later patch release or version
release,  reinstall the appropriate ERP.

 SUPPORT: For further information, contact HP Services.

 SUBSCRIBE: To subscribe to automatically receive future Security
Advisories from the Software Security Response Team via electronic mail:

 REPORT: To report a potential security vulnerability with any HP or
Compaq supported product, send email to:

 HP and Compaq appreciate your cooperation and patience. As always,
HP and Compaq urge you to periodically review your system management
and security procedures. HP and Compaq will continue to review and
enhance the security features of its products and work with our customers
to maintain and improve the security and integrity of their systems.

 "HP and Compaq are broadly distributing this Security Bulletin in order
to bring to the attention of users of the affected Compaq products the
important security information contained in this Bulletin. HP and Compaq
recommend that all users determine the applicability of this information
to their individual situations and take appropriate action. Neither HP
nor Compaq warrant that this information is necessarily accurate or
complete for all user situations and, consequently, neither HP nor Compaq
will be responsible for any damages resulting from user's use or disregard
of the information provided in this Bulletin."

ęCopyright 2002 Hewlett-Packard Company
Hewlett-Packard Company shall not be liable for technical or editorial
errors or omissions contained herein. The information in this document
is subject to change without notice. Hewlett-Packard Company and the names
of Hewlett-Packard products referenced herein are trademarks of
Hewlett-Packard Company in the United States and other countries.
Other product and company names mentioned herein may be trademarks
of their respective owners.

Version: PGP 7.0.4


Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References



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